As we all know, the Kingdom of Heaven is within. In our lord's residence there are many rooms. One of the door signs read RATIO.

Even back in the minds of KF or other ID proponents, that door is not closed. Anders Behring Breivik conditioned himself to ignore that door, but unless the door is jammed shut, a glint of rationality may shine through the darkness and that is what is holding them back: They know they are lost outside a sanctuary.

The thought of going naked out in the open scares them. They have a reason to, and they know it.